Symposium of the Dodd-Walls Centre for Quantum Science and Technology

Symposium of The Dodd-Walls Centre for Quantum Science and Technology

9-11 December 2008, Queenstown, New Zealand

Tuesday, December 9

8:15am–10:00am Ultra-cold atoms TBA, Presider

8:15am TuA1 — From thermal to quasi-condensate to superﬂuid: Observation of a 2D Bose-gas Keynote

Kristian Helmerson, Pierre Cladé, Changhyun Ryu, Anand Ramanathan, and William D. Phillips. Atomic Physics Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899-8424, USA. We present evidence of the crossover to a superﬂuid state in an optically trapped, 2D, atomic Bose gas. In addition, we observe an intermediate, quasi-condensate state between the thermal and superﬂuid state.

9:00am TuA2 — Bragg spectroscopy of a strongly interacting Fermi gas Invited

G. Veeravalli, E. Kuhnle, P. Dyke, and C. J. Vale. ARC Centre of Excellence for Quantum-Atom Optics, Centre for Atom Optics and Ultrafast Spectroscopy, Swinburne University of Technology, Melbourne, 3122, Australia. The Bose-Einstein condensate to Bardeen-Cooper-Schrieffer (BEC-BCS) crossover in fermionic 6Li is studied using Bragg spectroscopy. A smooth transition from molecular to atomic behaviour is observed and pair correlations are char- acterised.

9:30am TuA3 — General atom-optical quantum resonances Invited

S. A. Gardiner, K. J. Challis, T. P. Billam, P. L. Halkyard, and M. Saunders. Department of Physics, Durham University, South Road, Durham DH1 3LE, United Kingdom. Quantum resonances are an example of a dramatically quantum effect, and can manifest in a variety of different ways. I will cover recent theoretical progress with a particular view to possible experimental implementations in an atom-optical context.

Morning Tea (10:00am–10:30pm)

10:30am–12:10pm Ultra-cold atoms TBA, Presider

10:30am TuB1 — Birth of a superﬂuid: vortices and solitons in the formation of Bose-Einstein Invited condensates Matthew J. Davis, Ashton S. Bradley, Geoffrey M. Lee, and Brian P. Anderson. ARC Centre of Excellence for Quantum-Atom Optics, School of Physical Sciences, University of Queensland, Brisbane, QLD 4072, Australia. We ﬁnd that vortices and solitons can spontaneously appear in Bose-Einstein condensates formed via evaporative cooling in oblate and prolate harmonic traps. We compare our results with recent experiments, and discuss tests of the Kibble- Zurek mechanism.

11:00am TuB2 — Generating and measuring spatial entanglement Invited

Hans-A. Bachor, K. Wagner, J. Janousek, J.-F. Morizur, Honxin Zou, N. Treps, P. K. Lam, and C. Harb. ACQAO at the Australian National University, Canberra, Australia. Optical entanglement has become a key resourse for quantum information processing and communication. We are presenting here new results on spatial multi-mode entanglement that extend our range of options. Tuesday 2008 Dodd-Walls Centre Symposium, Queenstown / 2

11:30am TuB3 — Topological solitons in double-ring Bose-Einstein condensates Joachim Brand, Tania Haigh, and Ulrich Zülicke. Centre for Theoretical Chemistry and Physics and Institute of Fundamental Sciences, Massey University Auckland, Private Bag 102904, North Shore City 0745, Auckland, New Zealand. We consider rotating BECs in two coupled concentric ring traps. The phase diagram for a co-planar conﬁguration shows a rich structure with topological defects analogous to Josephson Vortices appearing in the ground state. 11:50am TuB4 — Atom chip interferometry of Bose-Einstein condensates R. Scott, T. E. Judd, and T. M. Fromhold. School of Physics and Astronomy, University of Nottingham, Nottingham, NG72RD, United Kingdom. I interpret recent experiments on atom chip interferometry of Bose-Einstein condensates. I ﬁnd that the decay of a soliton into vortices provides a mechanism for measuring the initial phase difference between the two merging clouds.

Lunch Break (12:10pm–1:30pm)

1:30pm–3:00pm Photonics TBA, Presider

1:30pm TuC1 — Photonic crystal ﬁbre refractive index sensors Invited

B. Kuhlmey. CUDOS, School of Physics, The University of Sydney, Sydney, Australia. We review recent developments in the field of photonic crystal fibre based microfluidic refractive index sensors, in particular using long period gratings, bandgap shifts and ultrasensitive directional couplers.

2:00pm TuC2 — Design considerations for THz lenses Rainer Leonhardt and Yat Hei Lo. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. We evaluate the performance of different types of lenses designed for THz imaging. By carefully tailoring the intensity distribution after the lens with the symmetric-pass lens, we are able to achieve a spatial resolution of 0.63λ. 2:20pm TuC3 — Towards a thermodynamic description of supercontinuum generation Stéphane Coen, Benoît Barviau, Bertrand Kibler, and Antonio Picozzi. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. Based on the kinetic wave theory, we describe continuous-wave supercontinuum generation as a thermalization process, i.e., an irreversible evolution of the optical ﬁeld towards a state of maximum nonequilibrium entropy. 2:40pm TuC4 — 10 Gb/s visible source based on sum frequency generation in a PPLN crystal Élodie Le Cren and John D. Harvey. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. We report the generation of a 10 Gb/s source at 639nm obtained via sum frequency generation in a Periodically Poled Lithium Niobate (PPLN) crystal, with applications in characterizing multimode polymer optical ﬁbres (POFs).

Afternoon Tea (3:00pm–3:30pm) Tuesday 2008 Dodd-Walls Centre Symposium, Queenstown / 3

3:30pm–5:30pm Ultra-cold atoms/Quantum optics TBA, Presider

3:30pm TuD1 — Dynamics with three-body loss in an optical lattice Invited

A. J. Daley, J. M. Taylor, S. Diehl, M. Baranov, and P. Zoller. Institute for theoretical Physics and centre for quantum physics, University of Innsbruck, Technikerstr. 25/2. A-6020 Innsbruck, Austria, and Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, Technikerstr. 21a, A-6020 Innsbruck, Austria. Three body loss processes for cold atoms in an optical lattice can be used to dynamically create effective three-body interactions. We investigate the many-body dynamics in this system using quantum trajectories methods with t-DMRG.

4:00pm TuD2 — Knots in spinor Bose-Einstein condensates Invited

Yuki Kawaguchi, Muneto Nitta, and Masahito Ueda. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan. We show that knots of spin textures can be created in the polar phase of a spin-1 Bose-Einstein condensate, and discuss experimental schemes for their generation and probe, together with their lifetime. 4:30pm TuD3 — Heat capacity of a Bose-Einstein condensate Ina B. Kinski and Andrew C.Wilson. The Jack Dodd Centre for Quantum Technologies, University of Otago, 730 Cumberland street, Dunedin, New Zealand. We report on recent progress towards the measurement of the heat capacity of a Rb Bose-Einstein condensate. Ultimately, a precise amount of added energy is related to an overall temperature increase of the system. 4:50pm TuD4 — Quantum dynamics of coupled triple well condensates C. V. Chianca, K. Dechoum, and M. K. Olsen. ARC Centre of Excellence for Quantum-Atom Optics, School of Physical Sciences, University of Queensland, Brisbane, QLD 4072, Australia. We investigate a three mode model of a triple well BEC system and calculate population and entanglement dynamics using the truncated Wigner representation. 5:10pm TuD5 — Scale invariant thermodynamics of a toroidally trapped Bose gas Ashton S. Bradley. The Jack Dodd Centre for Quantum Technologies, University of Otago, 730 Cumberland street, Dunedin, New Zealand. We determine the ideal gas thermodynamics of a system of noninteracting bosonic atoms in a harmonic-Gaussian potential, from the harmonic through to the deep toroid regime where system properties become independent of toroid size.

6:00pm–7:30pm Posters

TuP1 — Thermodynamics of trapped interacting TuP2 — Quasi-condensation and coherence in bosons in an optical lattice the quasi-twodimensional trapped Bose gas Danny Baillie. The Jack Dodd Centre for Quantum R. N. Bisset and P. B. Blakie. The Jack Dodd Centre for Technologies, University of Otago, 730 Cumberland Quantum Technologies, University of Otago, 730 street, Dunedin, New Zealand. Cumberland street, Dunedin, New Zealand. We model trapped interacting bosons in an optical lattice A theoretical investigation of quasi-condensation and co- at finite temperature using a Thomas-Fermi condensate herence in the quasi-two-dimensional trapped Bose gas. and a semiclassical HFBP depletion. We calculate thermodynamic properties such as the change in temperature during adiabatic loading. TuP3 — Time-resolved all fiber fluorescence TuP4 — Trapping a matter-wave soliton in a well spectroscopy system Thomas Ernst and Joachim Brand. Centre for A. Y. H. Chen, F. Vanholsbeeck, D.C.S. Tai, S. Swift, Theoretical Chemistry and Physics and Institute of N. Singhal, J. D. Harvey, D. A. Hooks, and B. H. Smaill. Fundamental Sciences, Massey University Auckland, Department of Physics, The University of Auckland, New Zealand. Private Bag 92019, Auckland, New Zealand. We investigate the quantum scattering of a BEC soliton on We describe a simple fluorescence spectrometry system an attractive well. We present numerical calculations and with a wide variety of biomedical applications. We a theoretical framework that describe phenomena like re- demonstrate the capabilities of the system by present- flection, resonant transmission and trapping of the soliton. ing experimental measurements of action potentials in the heart and GFP tagged bacteria. Tuesday 2008 Dodd-Walls Centre Symposium, Queenstown / 4

TuP5 — Macroscopic superpositions in small TuP6 — Towards exploring ultracold double well condensates hetero-nuclear KRb systems Tania Haigh, Andrew Ferris, Matthew J. Davis, and S. Hoinka, A. Rakonjac, C. McKenzie, and A. C. Wilson. Murray K. Olsen. School of Physical Sciences, The The Jack Dodd Centre for Quantum Technologies, University of Queensland, Queensland 4072, Australia. University of Otago, 730 Cumberland street, Dunedin, New Zealand. We consider small condensates in a double well potential, in particular the creation and detection of macroscopic su- With our novel KRb experiment we intend to study fermi- perposition states. We use a two-mode approximation, and bose mixtures of ultracold gases. Having created a dou- a number state analysis. ble species MOT, we are currently implementing the next steps toward further cooling to the quantum degenerate regime. TuP7 — Similariton compression in a comb-like TuP8 — All-fiber variable dispersion dispersion decreasing fibre compensator for a fiber-based optical coherence Sung-Hoon Im, David Méchin, Vladimir Kruglov, and tomography system John D. Harvey. Department of Physics, The University Sairam Iyer, Stéphane Coen, and Frédérique of Auckland, Private Bag 92019, Auckland, New Vanholsbeeck. Department of Physics, The University of Zealand. Auckland, Private Bag 92019, Auckland, New Zealand. Optical pulse compression using similariton propagation We report on the design and experimental demonstration in an optical fibre with decreasing dispersion has been of an all-fiber optical coherence tomography system in demonstrated by theoretical, numerical and experimental which residual chromatic dispersion is compensated by a means. This compression scheme can provide pedestal pair of fiber stretchers made with different fiber types. free compression down to 200 fs. TuP9 — Cavity-assisted two-photon Raman TuP10 — Characterization of quantum noise on photoassociation of Bose-Einstein-condensed photon echoes molecules Patrick M. Ledingham and Jevon J. Longdell. The Jack Markku Jääskeläinen. Institute of Fundamental Dodd Centre for Quantum Technologies, University of Sciences, Massey University, Private Bag 11 222, Otago, 730 Cumberland street, Dunedin, New Zealand. Palmerston North, New Zealand. We present results of the investigation of quantum noise We study the photoassociation of Bose-Einstein con- on standard photon echoes and controlled reversible inho- densed atoms into molecules using an optical cavity field. mogeneous broadening echoes. The stationary solutions for the atoms and molecules as well as the intracavity field are found and their stability properties are determined. TuP11 — P-wave pairing in two-component TuP12 — All-fiber polarization sensitive Fourier system with mismatched Fermi surfaces close domain OCT to Feshbach resonance Norman Lippok, Frédérique Vanholsbeeck, and Poul Renyuan Liao, Florentin Popescu, and Khandker Quader. Nielsen. Department of Physics, The University of Center for Theoretical Chemistry and Physics and Auckland, Private Bag 92019, Auckland, New Zealand. Institute of Fundamental Sciences, Massey University, We present an all-fiber, real-time, non-invasive imag- Private Bag 102 904, North Shore MSC, Auckland, New Zealand. ing technique based on low-coherence interferometry, for modeling and instrumentation of deformation stresses and We consider p-wave pairing in two component Fermi birefringence properties of skin. Signal acquisition is per- gases with mismatched Fermi surfaces. After resolving formed in the Fourier domain and dispersion is compen- gap structure, we construct phase diagram across BEC- sated and characterized. BCS regimes. We find breached pair superfluid with two Fermi surfaces of gapless excitation (BP2) could be stable in certain parameter regimes. TuP13 — Aspheric lenses for Terahertz imaging TuP14 — Strong coupling using rare-earth Yat Hei Lo and Rainer Leonhardt. Department of doped whispering gallery mode resonators Physics, The University of Auckland, Private Bag 92019, David McAuslan and Jevon J. Longdell. The Jack Dodd Auckland, New Zealand. Centre for Quantum Technologies, University of Otago, 730 Cumberland street, Dunedin, New Zealand. We demonstrate novel lens designs for terahertz imaging. Simulations and experimental results show that This poster will present the parameters that are required our symmetric-pass lens performs superior than others in to access the strong coupling regime in a rare-earth doped terms of spatial resolution and diffraction, with a focal whispering gallery mode resonator, and will discuss the spot size of about 0.63λ. initial progress that has been made towards achieving this aim. Tuesday 2008 Dodd-Walls Centre Symposium, Queenstown / 5

TuP15 — Sub-micron light structures for TuP16 — All-fiber ring similariton laser with trapping and manipulating a single neutral atom Raman pump M. McGovern, T. Grunzweig, and M. F. Andersen. The J. D. Harvey, V. Kruglov, and D. Méchin. Department of Jack Dodd Centre for Quantum Technologies, University Physics, The University of Auckland, Private Bag 92019, of Otago, 730 Cumberland street, Dunedin, New Zealand. Auckland, New Zealand. Our developments towards the construction of sub-micron We report here the theoretical and numerical predictions dipole traps to experimentally study quantum dynamics of of the output parabolic pulses in a ring laser with Ra- a single trapped 85Rb atom. man amplification. These similariton pulses tend toward a parabolic shape and accumulate a linear chirp during the propagation. TuP17 — Broadband source for multiplex TuP18 — Dissipation-driven quantum phase coherent anti-Stokes Raman scattering transitions in collective spin systems Priyanth Mehta, Stuart Murdoch, and Rainer Leonhardt. S. Morrison and A. S. Parkins. Department of Physics, Department of Physics, The University of Auckland, The University of Auckland, Private Bag 92019, Private Bag 92019, Auckland, New Zealand. Auckland, New Zealand. A broadband source is developed and investigated for Strongly dissipative collective-spin systems are studied use in Multiplex Coherent Anti-Stokes Raman Scattering where both first and second order dissipation driven quan- Spectroscopy (CARS). The red-detuned supercontinuum tum phase transitions are shown to occur. The bipartite based source can drive multiple Raman resonances of a spin-spin entanglement is found to exhibit pronounced polyatomic molecule. maxima at the critical points. TuP19 — Investigation of highly efficient photon TuP20 — Entangled photon states through echoes quantum control in a linear cavity array William Naylor. The Jack Dodd Centre for Quantum Changsuk Noh and H. J. Carmichael. Department of Technologies, University of Otago, 730 Cumberland Physics, The University of Auckland, Private Bag 92019, street, Dunedin, New Zealand. Auckland, New Zealand. TBA We investigate the transfer of a photon by way of time- dependent decay rates along a linear cascaded cavity array. With an appropriate choice of decay rates a maximally entangled state of the cavities is produced. TuP21 — Bragg Scattering in semiconductor TuP22 — Surface plasmon resonances in optical amplifiers metal-dielectric-metal materials R. J. Provo, D. A. Reid, D. Méchin, and J. D. Harvey. Charles Rohde. Department of Chemistry, The Department of Physics, The University of Auckland, University of Auckland, Private Bag 92019, Auckland, Private Bag 92019, Auckland, New Zealand. New Zealand. Bragg Scattering for wavelength conversion of telecom- Coupled surface plasmon resonances in metal-dielectric- munication data channels in semiconductor optical ampli- metal materials provide subwavelength manipulation of fiers is investigated. 10 Gbit/s data streams with 50 GHz light at visible frequencies. Periodic modulation of MDM and 100 GHz channel spacings were converted across surfaces produces tunable, enhanced absorption, transmis- 10 nm in the C-band. sion and asymmetric transmission. These phenomenon are examined theoretically and experimentally. TuP23 — Bragg scattering from a BEC close to a TuP24 — All optical Bose Einstein condensate Feschbach resonance and Loschmidt cooling Catarina E. Sahlberg, Rob J. Ballagh, and Crispin W. Arif Ullah and M. D. Hoogerland. Department of Gardiner. The Jack Dodd Centre for Quantum Physics, The University of Auckland, Private Bag 92019, Technologies, University of Otago, 730 Cumberland Auckland, New Zealand. street, Dunedin, New Zealand. The influence of an initial momentum on the appearance We show that a significant difference in the Bragg spec- of "quantum resonances" in the delta kicked rotor system trum arises from a model employing coupled atom and is explored experimentally. We have shown that for cer- molecule fields, compared to a single field model. This tain initial momenta, a resonance can be negated entirely, is qualitatively similar to that observed in recent experi- whereas at others the resonance can be made to appear. ments. We are also presenting an experimental demonstration of the effective time reversal of the atomic matter waves. TuP25 — Characterisation of 40 Gbit/s NRZ & RZ TuP26 — Photon correlation functions and DPSK optical modulation formats photon blockade in two-mode cavity QED R. T. Watts, M. A. Roelens, B. J. Eggleton, and J. D. S. J. Whalen and H. J. Carmichael. Department of Harvey. Southern Photonics Ltd, Auckland, New Physics, The University of Auckland, Private Bag 92019, Zealand. Auckland, New Zealand. Using the linear spectrogram technique, a complete char- Using numerical solutions of the master equation, we acterisation of 40Gbit/s NRZ & RZ DPSK optical mod- compute steady state second-order photon correlation ulation formats was performed. Real-time measurement functions in a system in which two optical cavity modes of the intensity and phase profiles of these phase-encoded interact with a Caesium atom via the 6S1/2, F = 4 ←→ ′ modulation formats was also realised. 6P3/2, F = 5 hyperfine transition. Tuesday 2008 Dodd-Walls Centre Symposium, Queenstown / 6

TuP27 — The dynamics of vortices in dilute TuP28 — Vortex nucleation and non-equilibrium Bose-Einstein Condensates at finite temperature dynamics in a Bose-Einstein condensate at B. G. Wild, R. J. Ballagh, and D. A. W. Hutchinson. The finite temperatures Jack Dodd Centre for Quantum Technologies, University T. M. Wright, R. J. Ballagh, A. S. Bradley, P. B. Blakie, of Otago, 730 Cumberland street, Dunedin, New Zealand. and C. W. Gardiner. The Jack Dodd Centre for Quantum We solve the time-independent Hartree-Fock Bogoliubov Technologies, University of Otago, 730 Cumberland street, Dunedin, New Zealand. (HFB) equations in the rotating frame to obtain stationary solutions for a precessing vortex in a quasi-two- We present a beyond-mean-field model of an atomic Bose- dimensional Bose Einstein condensate (BEC), using a Einstein condensate undergoing mechanical stirring, re- conservation law to determine the precessional frequency. vealing the dynamical thermalization of the atomic field Time-dependent solutions confirm these predictions. which facilitates the nucleation and motional-damping of superfluid vortices. TuP29 — All fiber widely tunable optical parametric oscillator Y. Q. Xu, S. G. Murdoch, R. Leonhardt, and J. D. Harvey. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. We present a widely-tunable, all-fiber parametric oscillator. The tuning range of the output spectrum stretches from 1262 nm to 1934 nm. The threshold power is mea- sured to be 700 mW for small frequency shift sidebands. Wednesday 2008 Dodd-Walls Centre Symposium, Queenstown / 7

Wednesday, December 10

8:15am–10:00am Quantum optics TBA, Presider

8:15am WeA1 — Translating Science into Business? Keynote

Thomas W. Mossberg. LightSmyth Technologies, Inc., 1720 Willow Creek Circle, Ste 520, Eugene, Oregon,97402 USA. Many academics consider starting a company based on their work. When is it a good idea? One story of “going commer- cial” is related here as is an overview of the underlying science behind the adventure. 9:00am WeA2 — Quantum noise in photon echoes J. J. Longdell, P. M. Ledingham, W. R. Naylor, M. P. Hedges, and M. J. Sellars. The Jack Dodd Centre for Quantum Technologies, University of Otago, 730 Cumberland street, Dunedin, New Zealand. Photon echoes maybe produced in two different ways: by the use of strong optical rephasing pulses and by controlling the inhomogeneous broadening. We investigate the quantum noise photon echoes made in both ways. 9:30am WeA3 — Beyond the vacuum Rabi doublet H. J. Carmichael. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. Physics in the nonlinear regime of the dissipative Jaynes-Cummings model is reviewed and attempts to realize its predictions are discussed. Recent experiments in circuit cavity QED are featured.

Morning Tea (10:00am–10:30pm)

10:30am–12:10pm Industry session TBA, Presider

10:30am WeB1 — TBA John D. Harvey. TBA 11:00am WeB2 — TBA Andrew C. Wilson. TBA 11:30am WeB3 — TBA TBA. TBA 11:50am WeB4 — TBA TBA. TBA

Lunch Break (12:10pm–1:30pm)

Symposium Dinner (7:30pm) Thursday 2008 Dodd-Walls Centre Symposium, Queenstown / 8

Thursday, December 11

8:15am–10:00am Biophotonics TBA, Presider

8:15am ThA1 — Photons for functional imaging: Microscopy and optical imaging technologies Keynote for in-vivo applications Elizabeth M. C. Hillman. Laboratory for Functional Optical Imaging, Departments of Biomedical Engineering and Radiology, Columbia University, New York, 10027, USA. In-vivo optical imaging can allow detailed observation of tissue function. A range of novel in-vivo optical imaging technologies will be described, and applications for brain, cardiac, skin and whole-body small animal imaging will be demonstrated.

9:00am ThA2 — Holographic aperture synthesis and other spatial frequency-domain approaches Invited to wide-field microscopy David D. Sampson, Timothy R. Hillman, Thomas Gutzler, and Sergey A. Alexandrov. Optical & Biomedical Engineering Laboratory, School of Electrical, Electronic & Computer Engineering, University of Western Australia, Australia. The three-dimensional spatial frequency domain representation of transfer functions is applied to proposed novel coherent and incoherent approaches to high-resolution imaging of biological samples. The coherent approaches use Fourier holography. The incoherent approach uses wavelength encoding of spatial frequencies. 9:30am ThA3 — Functional and structural all fiber in-vivo imaging F. Vanholsbeeck, A. Y. H. Chen, S. Iyer, N. Lippok, S. Coen, J. D. Harvey, and B. H. Smaill. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. With fluorescence imaging resolving the electrical activity and optical coherence tomography giving a histological overview of the organ under study, we have a complete set of tools to get a better insight of the physiology of electrically active organs.

Morning Tea (10:00am–10:30pm)

10:30am–12:10pm Photonics/Biophotonics TBA, Presider

10:30am ThB1 — Advances in nonlinear microscopy Invited

Allister I. Ferguson. Department of Physics, University of Strathclyde, Glasgow G4 0NG, Scotland, UK Nonlinear optical techniques have revolutionised optical microscopy and has opened a new vista in imaging in the life sciences. I will review some recent progress using examples from work undertaken at the University of Strathclyde. This will include multi-photon microscopy, coherent anti-Stokes Raman scattering microscopy and the use of adaptive optics to improve image quality.

11:00am ThB2 — TBA Invited

Ben J. Eggleton. TBA 11:30am ThB3 — The photon factory in the Dan Walls Centre Cather Simpson. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. The Dan Walls Centre for Pure and Applied Optics is establishing a state-of-the-art multi-user laser centre, with a wide variety of pulse widths, energies, wavelengths, and repetition rates. The current capabilities and status will be described, and future plans discussed. 11:50am ThB4 — TBA TBA. TBA Thursday 2008 Dodd-Walls Centre Symposium, Queenstown / 9

Lunch Break (12:10pm–1:30pm)

1:30pm–3:00pm Quantum optics TBA, Presider

1:30pm ThC1 — Mesoscopic superpositions of quantum phases and quantum states via Rydberg Invited interactions P. Zoller. Institute for Quantum Optics and Quantum Information, University of Innsbruck, Austria. We propose and analyze a scheme to entangle a single atom with a mesoscopic ensemble of cold atoms. The particular protocol is based on a dipole blockade mechanism for Rydberg excited atoms in combination with EIT.

2:00pm ThC2 — Conditional quantum dynamics in cavity QED with microtoroidal resonators A. S. Parkins. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. Recent theoretical and experimental results for cavity QED with microtoroidal resonators are presented, including the demonstration of conditional quantum dynamics with single photons and single atoms. 2:20pm ThC3 — Uncertainty inequalities as entanglement criteria Hyunchul Nha. Department of Physic, Texas A & M University at Qatar, PO Box 23874, Doha, Qatar. We show that uncertainty relations are both sufﬁcient and necessary to determine legitimate quantum states in general. The explicit construction in this proof can be used to systematically derive entanglement criteria in experimentally accessible forms. 2:40pm ThC4 — Experiments with an all-optical BEC Maarten D. Hoogerland. Department of Physics, The University of Auckland, Private Bag 92019, Auckland, New Zealand. We show results from the most recent experiments using the alloptical BEC in Auckland. We explore the delta-kicked rotor system over a range of parameters, and discuss new experiments.

Afternoon Tea (3:00pm–3:30pm)

3:30pm–5:10pm Ultra-cold atoms TBA, Presider

3:30pm ThD1 — Ultracold bosons in lattices with binary disorder Invited

K. V. Krutitsky, M. Thorwart, R. Egger, and R. Graham. Fachbereich Physik der Universität Duisburg-Essen, Campus Duisburg, Lotharstr. 1, 47048 Duisburg, Germany. Quantum phases of ultracold bosons with repulsive interactions in lattices in the presence of quenched disorder are investigated. The disorder is assumed to be caused by the interaction of the bosons with impurity atoms having a large effective mass. The phase diagram as well as experimentally accessible quantities are calculated in various regions of parameter space by using several methods. 4:00pm ThD2 — Molecules and Feshbach resonances treated by c-ﬁeld techniques Crispin Gardiner, Catarina Sahlberg, and Andrew Haines. The Jack Dodd Centre for Quantum Technologies, University of Otago, 730 Cumberland street, Dunedin, New Zealand. I will review progress on treating the Bose Nova, and Bragg scattering from condensates in which the scattering length is enhanced by a Feschbach resonance. Thursday 2008 Dodd-Walls Centre Symposium, Queenstown / 10

4:30pm ThD3 — Kelvin waves, varicose waves and superfluid turbulence in trapped Bose-Einstein condensates Tapio Simula, Takeshi Mizushima, and Kazushige Machida. Mathematical Physics Laboratory, Department of Physics, Okayama University, PO Box 700-8530, Okayama, Japan. I will discuss the creation, dispersion relations, dynamics, and decay of both Kelvin waves and varicose waves of quantized vortex lines in trapped Bose-Einstein condensates with a reference to a Kelvin-wave cascade and superfluid turbulence. 4:50pm ThD4 — Force on an impurity moving through a 1D Bose Einstein condensate at subcritical velocities Andrew Sykes, Matthew J. Davis, and David Roberts. ARC Centre of Excellence for Quantum-Atom Optics, School of Physical Sciences, University of Queensland, Brisbane, QLD 4072, Australia. We study the drag force acting on an impurity moving through a 1D Bose-Einstein condensate in the presence of both thermal and quantum fluctuations. We find nonzero force is exerted on the impurity even at subcritical velocities due to the surplus of fluctuations propagating downstream as opposed to upstream. Author index 2008 Dodd-Walls Centre Symposium, Queenstown / 11

Author index

Alexandrov, S. A., ThA2 Hillman, T. R., ThA2 Parkins, A. S., TuP18, ThC2 Andersen, M. F., TuP15 Hoinka, S., TuP6 Phillips, W. D., TuA1 Anderson, B. P., TuB1 Hoogerland, M. D., TuP24, ThC4 Picozzi, A., TuC3 Hooks, D. A., TuP3 Popescu, F., TuP11 Bachor, H.-A., TuB2 Hutchinson, D. A. W., TuP27 Provo, R. J., TuP21 Baillie, D., TuP1 Ballagh, R. J., TuP23, TuP27, TuP28 Im, S.-H., TuP7 Quader, K., TuP11 Baranov, M., TuD1 Iyer, S., TuP8, ThA3 Barviau, B., TuC3 Rakonjac, A., TuP6 Billam, T. P., TuA3 Jääskeläinen, M., TuP9 Ramanathan, A., TuA1 Bisset, R. N., TuP2 Janousek, J., TuB2 Reid, D. A., TuP21 Blakie, P. B., TuP2, TuP28 Judd, T. E., TuB4 Roberts, D., ThD4 Bradley, A. S., TuB1, TuD5, TuP28 Roelens, M. A., TuP25 Brand, J., TuB3, TuP4 Kawaguchi, Y., TuD2 Rohde, C., TuP22 Kibler, B., TuC3 Ryu, C., TuA1 C.Wilson, A., TuD3 Kinski, I. B., TuD3 Carmichael, H. J., TuP20, TuP26, Kruglov, V., TuP7, TuP16 Sahlberg, C., ThD2 WeA3 Krutitsky, K. V., ThD1 Sahlberg, C. E., TuP23 Challis, K. J., TuA3 Kuhlmey, B., TuC1 Sampson, D. D., ThA2 Chen, A. Y. H., TuP3, ThA3 Kuhnle, E., TuA2 Saunders, M., TuA3 Chianca, C. V., TuD4 Scott, R., TuB4 Cladé, P., TuA1 Sellars, M. J., WeA2 Lam, P. K., TuB2 Coen, S., TuC3, TuP8, ThA3 Simpson, C., ThB3 Le Cren, É., TuC4 Simula, T., ThD3 Ledingham, P. M., TuP10, WeA2 Daley, A. J., TuD1 Singhal, N., TuP3 Lee, G. M., TuB1 Davis, M. J., TuB1, TuP5, ThD4 Smaill, B. H., TuP3, ThA3 Leonhardt, R., TuC2, TuP13, TuP17, Dechoum, K., TuD4 Swift, S., TuP3 TuP29 Diehl, S., TuD1 Sykes, A., ThD4 Liao, R., TuP11 Dyke, P., TuA2 Lippok, N., TuP12, ThA3 Tai, D., TuP3 Egger, R., ThD1 Lo, Y. H., TuC2, TuP13 Taylor, J. M., TuD1 Eggleton, B. J., TuP25, ThB2 Longdell, J. J., TuP10, TuP14, WeA2 TBA, , WeB3, WeB4, ThB4 Ernst, T., TuP4 Thorwart, M., ThD1 Méchin, D., TuP16 Treps, N., TuB2 Ferguson, A. I., ThB1 Machida, K., ThD3 Ferris, A., TuP5 McAuslan, D., TuP14 Ueda, M., TuD2 Fromhold, T. M., TuB4 McGovern, M., TuP15 Ullah, A., TuP24 McKenzie, C., TuP6 Gardiner, C., ThD2 Mehta, P., TuP17 Vale, C. J., TuA2 Gardiner, C. W., TuP23, TuP28 Mizushima, T., ThD3 Vanholsbeeck, F., TuP3, TuP12, Gardiner, S. A., TuA3 Morizur, J.-F., TuB2 TuP8, ThA3 Graham, R., ThD1 Morrison, S., TuP18 Veeravalli, G., TuA2 Grunzweig, T., TuP15 Mossberg, T. W., WeA1 Gutzler, T., ThA2 Murdoch, S., TuP17 Wagner, K., TuB2 Murdoch, S. G., TuP29 Watts, R. T., TuP25 Haigh, T., TuB3, TuP5 Méchin, D., TuP7, TuP21 Whalen, S. J., TuP26 Haines, A., ThD2 Wild, B. G., TuP27 Halkyard, P. L., TuA3 Naylor, W., TuP19 Wilson, A. C., TuP6, WeB2 Harb, C., TuB2 Naylor, W. R., WeA2 Wright, T. M., TuP28 Harvey, J. D., TuC4, TuP3, TuP7, Nha, H., ThC3 TuP16, TuP21, TuP25, Nielsen, P., TuP12 Xu, Y. Q., TuP29 TuP29, WeB1, ThA3 Nitta, M., TuD2 Hedges, M. P., WeA2 Noh, C., TuP20 Zoller, P., TuD1, ThC1 Helmerson, K., TuA1 Zou, H., TuB2 Hillman, E. M. C., ThA1 Olsen, M. K., TuD4, TuP5 Zülicke, U., TuB3